Furnace-wall construction



Nov. 26, 1929.

G. P. JACKSON FURNACE WALL CONSTRUCT I ON Filed Oct. 2, 1925 PatentedNov. 26, 19,29.

UNITED STATES PATENT OFFICE GEORGE P. JACKSON, OF FLUSHING, NEW YORK,ASSIGNOR TO INTERNATIONAL COM- BUSTION ENGINEERING CORPORATION, 0F NEWYORK, N. Y., A CORPORATION OF DELAWARE FURNACE-WALL CONSTRUCTIONApplication filed October 2, 1925.

This invention relates to furnace Wall con` struftions and isparticularly adapted for use in connection with pulverized fuel burningfurnaces, although its advantages may be useful in other connections.

One of the primary objects of the invention is to provide a simple,inexpensive and effective wall, easy to assemble.

Another object of the invention is the provision of a combined waterwall and refractory wall arranged for permanence of the refractories.

How the foregoing, together with such other objects as may hereinafterappear, or are incident to my invention, are realized, is illustrated inthe accompanying drawings, wherein:

Fig. 1 is a fragmentary elevation of a portion of the wall with themetallic shell and lining broken out to expose the filler tiles 5 Fig. 2is a-vertical section taken on the line 2--2 of Fig. 1; and

Fig. 3 is a plan section taken on the line 3-3 of Fig. 1.

For purposes of description, the wall shown in the drawings may beconsidered as an upright wall of a pulverized fuel burning furnace, say,for example, the rear Wall of the combustion chamber, although it may belused elsewhere toa'dvantage. The wall comprises an outer metallic shell7 an insulative lining 8 composed, for example, of 13 parts by volume ofSil-o-cel and 1 part by volume of Portland cement or similar material;an inner tube wall 9 next the flame and spaced from the lining 8; andfiller tiles or blocks 10 for filling the space between the tube wall 9and the lining 8.

The tube wall 9 is formed of a plurality of water tubes 11 havingoppositely disposed longitudinal fins 12. The tubes are arranged so thatthe fins approximately abut, thus providing a metallic inner face forthe wall. Circulation through the tubes is provided by suitablyconnecting them into the circulation of the associated boiler.

Reverting now to the filler tiles 10 and the manner of supporting thesame, it will be seen that the tiles are arranged in horizontal courses,certain courses of which are anchored Serial No. 60,016.

to the outer metallic shell 7 as will now appear. ranged at suitableintervals throughout the height of the Wall, two of such coursesappearing in Figs. 1 and 2 as indicated by the numerals 13, 13. Thesecourses are secured to the metallic shell as by means of the bolts 14adapted to engage the flattened portionsv 15, 15 of adjacent tiles,which tiles are here shown as spaced apart to provide slots for thebolts 14. A washer 16 may be provided under the head of the bolt toensure proper engagement with the tiles or blocks.

By this arrangement a number of shelves so to speak, are provided forsupporting the intermediate tiles or blocks. Furthermore, the fillerbricks 10 are supported from the metallic shell at spacedl points thuspreventing thrusts on the tube wall as might result, for example, if thebricks were free to shift inwardly against the tubes.

The inner face of this filler wall that is the face adjacent the tubewall is provided with grooves for receiving the tubes.

From the foregoing it will be seen that an These anchored courses areareffective furnace wall is provided, the tiles p thin.

It is to be observed that the filler wall 10 is entirely supported fromthe shell 7 with the lining 8 interposed therebetween so that thisportion of the wall is a unit which can expand and contract irrespectiveof the tube wall. In this connection, where the ends of the tubes of thewalls extend exteriorly of the wall, sand joints are used between suchtube ends and those portions of'the refractory wall through which ,theypass.

It will beseen that the bolts 14 come behind tubes of the water wall andthey are thus protected from becoming excessively heated. The bricks -ofone course have the tube receiving sockets in the middle ortion of theinner faces. The next course o bricks will have the sockets formed atthe inner corner portions, as will be clear on inspection of Figs. 1 and3.

What I claim is':

1. A furnace wall comprising, in combination, structural work, an outermetallic shell secured thereto, a lining on the inside of the shell, awater wall spaced inwardly from said lining and composed of a pluralityof upright tubes, liller tiles in the space between the lining and thetube wall, alternate courses of which on their inner faces arerespectively socketed at their ends and in the middle to lit the tubesaround their outer halves, and means for securing certain of said tilesto the metallic shell, said secured tiles servingy to support thebalance ofthe tiles.

2. A furnace wall comprising, in combination, structural work, an outermetallic shell secured thereto, a lining for the shell, a water wall ofupright tubes spaced from said lining, refractory blocks inthe spacebetween the lining and the tube wall, said blocks having grooves thereinwhereby the blocks are adapted to fit partly around said tubes, andmeans for supporting the blocks in groups from the metallic shell.

In testimony whereof, I have hereunto signed my name.

GEORGE P. JACKSON.

